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From "James Thomas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-10838) Byte array native checksumming
Date Fri, 18 Jul 2014 18:56:05 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-10838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14066735#comment-14066735
] 

James Thomas commented on HADOOP-10838:
---------------------------------------

Also just performed the same analysis for only this change (excluding the patch in HDFS-6561)
and got a 11% CPU cycle improvement and a 3% wall clock improvement.

> Byte array native checksumming
> ------------------------------
>
>                 Key: HADOOP-10838
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10838
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: performance
>            Reporter: James Thomas
>            Assignee: James Thomas
>         Attachments: HADOOP-10838.2.patch, HADOOP-10838.3.patch, HADOOP-10838.patch,
HDFS-3528.patch, HDFS-6560.patch
>
>




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